Double Magazine Pouch .45 ACP fits:
 
Sig Sauer P320 .45 ACP |Sig Sauer P250 .45 ACP |Sig Sauer P227 |Taurus .45 ACP 24/7 OSS | H&K USP .45 | H&K USP 9mm/.40 | H&K 45C | 1911 .45 double stack variants| BUL M-5